Rob is reportedly devastated about Kristen’s affair — but he might be willing to forgive her! Read on to find out why.

According to a new report, the 26-year-old Twilight star is absolutely devastated over the news about his girlfriend, Kristen Stewart‘s affair with Rupert Sanders.

“Rob is beyond devastated. He’s so heartbroken. He’s shocked she could hurt him and humiliate him this way,” a source tells Us Weekly. “He doesn’t know what to do. He doesn’t know if he should forgive her or no.”

Rob reportedly feels so lost because fame with Kristen is all he’s ever known.

“Rob’s whole experience of coming into fame was experienced with Kristen,” another source tells the mag. “This is going to be really tough. Nobody knows if they’ll stay together at this point.”